dragnet vs quicksand

dragnet

noun
  • A net dragged across the bottom of a body of water. 

  • Heightened efforts by law-enforcement personnel to capture suspects. 

verb
  • To make heightened efforts to catch a suspect. 

  • To drag a net across the bottom of a body of water. 

quicksand

noun
  • Wet sand that appears firm but in which things readily sink, often found near rivers or coasts. 

  • Anything that pulls one down or buries one metaphorically 

How often have the words dragnet and quicksand occurred in a corpus of books? (source: Google Ngram Viewer )